Locomaaan

iTrader: (1)

I finally got them installed today, OMG its loud i dont knoe if that is normal but it is quite loud with my stage 1 exhaust. Dont get me wrong but wow i wasnt expecting that much increase in sound. I also noticce a small drop in power under 3k that everybody notices but it just explodes after that. I got a lil bit if rasp between 2-3k but its actually kinda nice, it gets replaced by a G35 like growl after 3500. Before driving the car i let it idle for 10 min. Does it really get louder after a few days? More power?

JwongTLS

nice, I was planning to run with stage 1 exhaust too. Are u using the stock 3rd cat? HFC?

gkr-718

if you are runnig the stock 3rd cat, change it fast you dont want clugging....

ps.ur high end must of went up by a lot

lilsid112

iTrader: (7)

i installed rv6 pre cat deletes, j pipe, and resonated test pipe but still have my stock exhaust and it had a really nice tone. i also have a bit of rasp between 2k and 3k rpm. i do want to take out my mid pipe pretty soon.

greco9885

iTrader: (1)

+1

a few members have stated that the difference between having the 3rd cat in place, and off isnt noticeable, and it didnt change the noise, or get rid of the rasp.

but i can not confirm, but the member is a very well "respected" member here

Locomaaan

iTrader: (1)

yea i kept my stock third cat. My high end went up quite a bit, it is very noticable.

im not sure what clugging is though.

greco9885

iTrader: (1)

he means bottle necking ur exhaust.

think of it like this, take 2 soda bottles, and connect them at the opening. when u move the liquid back at forth it gets stuck and will slowly go into the other bottle. now if u cut the opening above the label, and connect it and move the liquid back and forth it will flow freely.

kinda like ur exhaust, drop the 3rd cat, get richie's race pipe, or test pipe for $65 i think

Locomaaan

iTrader: (1)

I have the tedt pipe but i didnt install cuz i wanted to cut down some of the fumes. How much worse will the fumes be with the test pipe on?

greco9885

iTrader: (1)

it will smell like gas. i bet it does now. but the fumes shouldnt matter, its not like u park ur car inside ur house and let it idle 24/7

jerome736

haha, just don't get pulled over.

greco9885

iTrader: (1)

what would happen if he got pulled over? u really think a cop is gunna drop on the ground, or open his hood and be like "HEY FUCK HEAD, U HAVE NO CATS, HERES ANOTHER TICKET"

Locomaaan

iTrader: (1)

Ya thats what i meant, the gas smell. I can smell it now, i guess it cant get much worse. What would quiet it down more , re-install mid-muffler or replace stock res with an aftermarket?

JwongTLS

U can get a hi flow cat that should cut down the smell a little if u care. Im also interested to know if a HFC would cut down the tone..maybe a little?

greco9885

iTrader: (1)

HFC doesnt do shit. from what i remember, allon(blackura) had one and IMO it sounded just like a fully catless car.

also thewanderer tried putting his stock cat/HFC/race pipe on and he said it was all the same

JwongTLS

hmm... nvm then jus pocket that 300 bucks and blow a ounce

I thought it should help with a little performance and emissions even tho its useless with precats

Locomaaan

iTrader: (1)

What about the mid muffler? Would that make quieter? I notice a lil more raspiness today

JwongTLS

if it's too raspy for u, u should add another resonator..screw the mid muffler

I hate cars

Yes, they do that here. If they look under the car, don't see a cat, you lose the car and it's crushed.

I hate cars

You guys are making this waaaay too difficult. If it's too loud or raspy, add a straight through muffler somewhere in the exhaust system like in the 3rd cat location. The longer the muffler the quieter.

The 3rd cat is essentially a high flow cat. It may make a small difference if you remove it but not much.

Opel

you know what the amazing part is....and i wanna ask first before i give my answer.... does anyone actually know where the raspiness comes from at 3k?

jerome736

I live in Irvine, CA...the cops will give you a fix it ticket/make you see a state judge just for a car that sounds "too loud"...I've had a lot of friends had their hoods popped.

Locomaaan

iTrader: (1)

So adding a long dynomax resonator after my stock resonator will do the trick u think? Or magnaflow res?

erick3

i really need to do something about the smell...maybe put the stock 3rd cat back in i can't seem to forgo the extra punch to actually get rid of the entire setup all together though lol

greco9885

iTrader: (1)

wow thats crazy

thats true, i forgot about CA and their smog control

I hate cars

It sounds funny to me. I'm old enough to remember when not every car had a convertor and the smell was just normal to me, in fact I never really thought about the smell. I remember the nights of running straight Av gas in the GN catless of course with my eyes watering and nose running from the sweet smell. People pulling up next to me looking over trying to figure out what the smell was and people who knew commenting that I was out to race.

stillhere153

iTrader: (1)

the same thing that causes drone... the resonance... some people don't like rasp... me.... I love it... especially at 100mph fly by

Opel

no no no, im not talking about drone,....im talking about that crack at 3k on our cars

Locomaaan

iTrader: (1)

Rasp is GONE!!! I added a long magnaflow resonator between the 3rd cat and stock res and now im left with a nice tone without rasp during accel all they way up to redline. I do notice a bit of rasp when i let off the throttle at high rpm but that i can deal with, its sounds, dare i say it, ferrari-ish. Any ways im totally happy with my exhaust now.

Time ti get that UR pulley installed.

Thanks for all thw feedback guys very much appreciated.

I will post some vid clips soon

erick3

hahahahahahahahahahahahaha

erick3

yeah, everyone says the smell's no different than from an old-school muscle car or your beastly GN lol (aside from still being slow as F@#*)

btw, get your car fixed after the ZR1 run? dude, that was SWEET! lol

NedShneebly

dynamax went out of business, i think. late, but I added a dynamax resonator to full RV6/Test Pipe/ATLP Base and it's very mellow and not cracking/droning/rasping. just enough to know it's there.

madcaps

iTrader: (1)

Where exactly within the exhaust system do you install the resonator? ie. between jpipe and 3rd cat, etc. Thanks for the help!

I hate cars

Nah, it's going to sit for a while. Can't afford to fix it and I'm just a few parts away from having the built motor ready so I'll have to upgrade the rear anyway. The goal is 850rwhp and streetable.

gilla_monster

iTrader: (2)

Tell us/me!

Opel

and i dont mean, raspiness throughout the entire rev band...i mean the specific "crack" at 3000 rpm

the car has a dual-stage intake manifold...opens at 3k.... while below 3k, the intake manifold is split into 2 sub-plenums (anyone whos ever looked inside, would've seen the butterfly) isolating 3 cylinders on one side, and 3 on the other...when butterfly opens up at 3k, the whole manifold becomes as 1 plenum...this changes how the air pressure acts for a split sec, resulting in a different cylinder filling...which causes that annoying "crack" at 3k

if you need a better and scientific explanation on how and what exactly happens inside a dual-stage intake manifold...do a little research on your own...i doubt youll find anywhere, saying about the exhaust sound change...but it will come to you

just say im the first one you ever heard it from

alexSU

iTrader: (3)

+1 sounds very beastly too!

I hate cars

Come on guys, raspiness and the classy TL don't go together. Raspiness is for a 4 banger bodykit, huge wing ragged out Civic with a 16yr old driver with hat sideways. IMO one of the worst sounds ever created.

alexSU

iTrader: (3)

I agree. It's pretty raspy during daily driving but that disappears when your doing 80mph fly by's (mine sounds very good at high speeds) I hate the rasp don't get me wrong, I'm still saving up for the ATLP exhaust.

Inaccurate

Dual-Stage Intake Manifold

Like the RL and MDX, the TL utilizes a dual-stage intake manifold to boost performance across the powerband. Working in concert with VTEC, this manifold improves low-speed torque without sacrificing high rpm power. The manifold is divided into two banks with three cylinders fed by each bank. The powertrain control module (PCM) controls butterfly valves between each bank. At low engine speeds the valves are closed; each separate bank of the manifold is tuned to maximize the resonance effect of the incoming air and increase cylinder filling and the torque through the lower part of the engine's rpm range.

As the engine rpm rises, the resonance effect fades, and the butterfly valves connecting the two banks of the intake manifold open. Now the resonance from individual pressure pulsations is eliminated, and an inertia affect helps the mass of air rushing down each intake passage. This provides more charge than each cylinder would normally ingest, working like mild supercharging to enhance horsepower at high engine speeds. The manifold changeover rpm is set somewhat lower in the rpm range than is the VTEC changeover rpm. This works to smooth and broaden the torque delivery. More than 75 percent of the peak torque is available from 2100 rpm to 6500 rpm.

I hate cars

A turbo will take away the rasp.